diff --git a/Controller/DocumentationController.php b/Controller/DocumentationController.php
index 2bc0915..453c2e2 100644
--- a/Controller/DocumentationController.php
+++ b/Controller/DocumentationController.php
@@ -48,10 +48,15 @@ final class DocumentationController
         }
 
         $spec = $this->generatorLocator->get($area)->generate()->toArray();
+
         if ('' !== $request->getBaseUrl()) {
             $spec['basePath'] = $request->getBaseUrl();
         }
 
+        if (empty($spec['host'])) {
+            $spec['host'] = $request->getHost();
+        }
+
         return new JsonResponse($spec);
     }
 }
diff --git a/Tests/Functional/SwaggerUiTest.php b/Tests/Functional/SwaggerUiTest.php
index 67f97a9..4d958e4 100644
--- a/Tests/Functional/SwaggerUiTest.php
+++ b/Tests/Functional/SwaggerUiTest.php
@@ -58,7 +58,7 @@ class SwaggerUiTest extends WebTestCase
     public function testJsonDocs()
     {
         $client = self::createClient();
-        $crawler = $client->request('GET', '/app_dev.php/docs.json');
+        $client->request('GET', '/app_dev.php/docs.json');
 
         $response = $client->getResponse();
         $this->assertEquals(200, $response->getStatusCode());
@@ -66,6 +66,7 @@ class SwaggerUiTest extends WebTestCase
 
         $expected = $this->getSwaggerDefinition()->toArray();
         $expected['basePath'] = '/app_dev.php';
+        $expected['host'] = 'api.example.com';
 
         $this->assertEquals($expected, json_decode($response->getContent(), true));
     }